I would like to make a unit with multiple 10 MHz 50 Ohm outputs to feed my various bits of test equipment. I am thinking about some practical considerations.
1) It would be great if there was a circuit published which can give 50 Ohn output impedance from a 12-15 power supply, which a) Doesn't load the TCXO b) Doesn't degrade the phase noise. c) Powered the LTE lite. Ideally one for both 10 & 20 MHz crystals. Better still if there was a PCB available. 2) How should I mount the components? My preference would be a metal box with * IEC mains socket * antenna input socket * 9-pin D for reading dats * 15 BNC's outputs With a power amplifier to provide the output for 15 sockets, some ventilation possibly requiring a small amount of forced air cooling would be needed. But given the TCXO"s sensitivity to temperature changes, I don't know whether it might be preferable to mount the LTE lite in its own box without any power supplies in it - perhaps with some thermally insulting material around the LTE lite so the crystal doesn't experience any fast temperature changes. Then have the power hungry bits completely separately. I don't have a particularly big lab, so wherever I mount the LTE lite, the temperature is going to change with the air conditioning unit blows hot or cold There are fairly large temperature changes when I am not using the lab, as I don't run the air conditioning unit 24/7. I am interested in people's thoughts on the best way to go about this. For testing I have a couple of signal generators that have ovens that are powered 24/7. Also I should soon have the SR620. Dave. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.